diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index c6c0c9324ef286b48c85b6bb2d4a54791c91c58c..438e5618df8e3ee56da72673fdb7c8c71fe936a3 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -298,7 +298,7 @@ int32_t tscGetTopbotQueryParam(SQueryInfo* pQueryInfo) {
 
     int32_t functionId = pExpr->functionId;
     if (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM) {
-      return pExpr->param[0].i64;
+      return (int32_t) pExpr->param[0].i64;
     }
   }